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From Robert Coli <rc...@eventbrite.com>
Subject Re: best way to measure repair times?
Date Fri, 20 Mar 2015 00:31:00 GMT
On Thu, Mar 19, 2015 at 4:56 PM, Rahul Neelakantan <rahul@rahul.be> wrote:

> Wouldn't GC Grace set to 34 days increase the bloat in the DB?
>

Yes, but as I say in the ticket, my belief is that the fixed cost of repair
combined with the fact that it frequently doesn't work at all (hangs
forever, etc.) is much more expensive than the on-disk bloat. With
incremental and/or snapshot repair which actually works (arriving Real Soon
Now) the inputs into the cost/benefit analysis change.

On ticket, Jonathan Ellis waves his hands and asserts that current costs
are likely to be equal in the typical user's case. This suggests that the
typical user is doing a bunch of DELETE in a log structured database with
immutable data files, which seems rather unlikely to me...

=Rob

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